JPS6041050A - Image forming device - Google Patents

Abstract

PURPOSE:To maintain the processing capacity of the total device constant by increasing conveyance interval of transfer papers when the temp. of a fixing device lowers to or below a prescribed value during successive fixing operation. CONSTITUTION:When a fixing device reaches, e.g., 150 deg.C after turning of a power supply, fixing rollers 31-1, 31-2 are reduced in rotation speed, and when it reaches, e.g., 170 deg.C, they are raised in rotation speed and come into a stand-by state. The temp. is controlled to keep it, e.g., at 180 deg.C during the stand-by. When the temp. lowers to or below 150 deg.C, copying operation is made impossible. When the copying operation is continued, the heat of the fixing device is absorbed to the transfer papers to lower the temp. When the temp. of the device lowers to a prescribed temp., e.g., 160 deg.C, copying intervals are enlarged by changing a sequential control, and when the device rises to 170 deg.C, it is returned to the normal sequential control.

Description

[Detailed description of the invention]

(Technical Field) The present invention relates to an image forming apparatus that prevents a temperature drop in a fixing device. (Prior art) Conventionally, in a device that performs a constant nozzle of transfer paper using a heater in a fixing device, the temperature is always within a certain range (for example, 180°C).
before and after). However, when a large amount of fixing is performed continuously, heat is absorbed by the transfer paper, and the temperature of the fixing device gradually decreases. In such a case, the fuser will be heated to a specified temperature (for example, 150℃).
If the temperature drops below this level, the operation must be stopped and the temperature of the fixing device must rise. As a result, there has been an inconvenience that the processing capacity has decreased. Further, in image forming apparatuses such as copying machines, the current capacity thereof is limited due to electrical outlets and the like. Therefore,
It is generally impossible to increase the heater drive current even when the power of the fixing device has decreased. (Objective) In view of the above-mentioned points, an object of the present invention is to perform a large amount of constant A operation. An object of the present invention is to provide an image forming load that does not stop a series of fixing operations even when the fixing operation is continuous. The present invention is configured to increase the conveyance interval of the transfer paper when the distance decreases.(Example) The present invention will be described in detail below with reference to the drawings. Fig. 1 (2) is a cross-sectional view showing the entire embodiment of the applied double-sided duplexer, and Fig. 1 (1)
), Figure 1 (3) is an enlarged view of the transfer paper conveyance path in
It is an enlarged view showing the transfer paper switch puncture 7; 11 in Fig. (1). In each of these configuration diagrams, the surface of the tram 1 consists of a seamless φ light body with a three-layer structure using a CdS photoconductor.
Rotation is started in the direction of the arrow by a main motor (not shown) that is rotatably supported and activated in response to pressing of a copy start key. When the drum 1 has rotated for a predetermined time and the upper level control process (preprocessing) described later is completed, the document placed on the document table crow 34 is illuminated by an illumination lamp 40 integrated with the first scanning mirror 39. The reflected light is scanned by the first scanning mirror 38 and the second scanning mirror 36. The first scanning mirror 39 and the second scanning mirror 36 are
By moving at a speed ratio of 2, the document is scanned while the optical path length at the front blade of the lens 35 is always kept constant. Thus, the above-mentioned reflected light image passes through the lens 35, the third mirror 38, and the fourth mirror 37, and forms an image on the drum 1''2. The tram 1 is completely discharged by the pre-exposure lamp 8 and the pre-discharge charger 2, and then corona-charged (eg +I) by the negative charger 3.Then, the illumination lamp 40 The irradiated image is exposed to a slint. At the same time, corona removal 11j (AC or primary) 1 - ton and opposite polarity, e.g. Surface uniformity by lamp 9:・t'fi
Make the light and then contrast the drum with 1” second one,
The electrostatic latent image on the back of the photosensitive tram 1 is developed by the developing roller of the developing device 7 and visualized as a toner image, and the toner image No. 7 is transferred by the transfer charger 5. The transfer paper in the upper cassette 13 or the lower cassette 14 is fed into the copying machine by a paper feed roller 11 or 12, and is sent toward the photosensitive drum 1 with precise timing by a registration roller 15, where it is transferred to the leading edge of the latent image. The leading edge of the paper is matched. After that, transfer charger 5 and tram 1
By passing the transfer paper between the two drums, the toner image on each drum is transferred. After the transfer is completed, the transfer paper is separated from the tram l. Determined by the paper detection sensor 16 and the conveyor health I/17! 1
0-ra 32, and constant λ11- is applied by applying pressure and heating.
Thereafter, the first generation detection sensor 18 is flushed and ejected υ1 from the machine by the discharge rollers 18-1 and 18-2. After the summer λ゛i ends, the fixing roller 321 is cleaned by the roller 30. I-ram 1 after transfer rotates &7
1′. Then, the surface is cleaned by a cleaning device 6 comprising a cleaning roller and a second brake I. On the right side of the pedicle 200 is a deck 54 that can be cut out from the main body 100 and can accommodate 2000 sheets of transfer paper, and an intermediate tray 58 for double-sided copying. Also, 20
The lifter 54L of the deck 54, which can accommodate 00 sheets, is raised according to the amount of transfer paper so that the transfer paper always comes into contact with the paper feed roller 50. For double-sided copying, first press the flapper 33-1 of the main body 100.
is raised to guide the copied transfer paper toward the pedestal 200 and store it in the intermediate tray 59 via the conveyance path 57 of the pedestal 200. Then, the paper size control plate 56 is moved according to the paper size to be stored. This intermediate tray 59 can store up to 98 sheets of transfer paper. During the next back side copying, the transfer paper stored in the intermediate tray 58 is guided to the registration roller 15 of the main body +00 via the path 58 by the action of the paper feed rollers 51, 52 and the conference roller 53. Further, 300 shown in FIG. 1 (1) is an automatic document feeder (
ADF), 87-1 is a paper feed tray on which a document is set, and +37-2 is a paper discharge tray. When a copy start button (not shown) provided on the main body 100 is pressed, the original tA is moved to the paper feed rollers 88-1. Conveyance roller 68-
2. It is guided to a conveyor belt 68-4 via a separating roller 68-3 for preventing double feeding. Then, H1t of the main body 100
The original is placed in a predetermined position on the Jt glass 34.
1 and starts copying operation. When a series of copying operations for the original document is completed, the transport bell l-88-4 is activated, and the original document is transferred to the paper ejection tray 67-5 via the paper ejection section B8-5.
It is discharged to 2. Further, while the original is in the paper feed tray 67-1, the next original is fed simultaneously with the ejection operation. Furthermore, 400 is a collating device 2i' (sorter) which collates the copies ejected from the main body. e6 is a sort hint, and its number of bins is 20. Reference numeral 62 is a non-sorting bin, and if copying from l original or 21 sheets or more, transfer 7J from the 21st sheet onward after copying is completed, or after copying from paper or when interrupt copying occurs in the main body 100. The paper will be published in the newspaper JJF. 64 is
These two rampers are used to flow the transfer paper to the next sorter when a plurality of sorters 400 are used in conjunction with each other. FIG. 2 is a plan view showing the operation panel provided in the copying machine main body 100 shown in FIG. 1(1).
5 is upper stage force cera) 13. Lower cassette 14 and 2000
This key is used to select the sheet storage deck 54. 81
is a slide lever for setting the copy density, and position 5 indicates the standard density. 73 is a numerical key for setting the number of copies, 74 is a clear key for canceling the value, and 72 is a key for temporarily interrupting the copying operation and executing another copy before the copying of the set number by key 73 is completed. 70 is a copy key for instructing the start of copying;
Reference numeral 71 is a stop key for stopping the copy operation during continuous Wt copying, and keys 76, 77, and 78 are keys for selecting equal size copy, enlarged copy + Nji small copy, respectively. 84 to 88 are indicators for displaying the selected reduction ratio; 86 is for displaying the selected reduction copy mode;
95 displays the enlarged copy mode, and 84 displays the same size copy mode. Further, 83 is a display that displays the cassette 13, 14 or deck 54 selected by the cassette selection key 75, and 92 is a display that displays the size of the transfer paper loaded in the selected cassette. be. The display θ2 also blinks if the selected cassette is inappropriate when the reduction key 78 is turned on. At the same time, the size of the previously selected cassette is also illuminated. Furthermore, 82 to 86 are warning indicators regarding the main unit, all of which are displayed with pictograms. That is, 82 is a paper feed check indicator, which lights up when copy paper is jammed inside the machine. Reference numeral 83 lights up when there is no cassette in the cassette I/stand indicated by the transfer paper/cassette display, or when there is no transfer paper in the cassette set in the cassette stand. 84 is the discharge toner il
l! This is a full indicator, which lights up when the toner container (not shown) that has been used and collected once in the copying machine is full. Reference numeral 85 denotes a developer replenishment indicator, which lights up when the amount of developer in the developing device falls below a specified amount. Reference numeral 86 is a key counter confirmation indicator, which lights up when the key counter is not inserted into the socket of the main body. Reference numeral 88 denotes a wait (standby) indicator, which lights up when the temperature of the fixing heater is lower than a specified value when the electric power switch is turned on, and turns off when the temperature reaches the specified value or higher and Way I processing is completed. Reference numeral 87 denotes a number-of-copies display, and when a desired number of copies is set using the numeric keypad 73, the set number is displayed in seven segments, and from 1 to 88 copies can be set in the minus bar. Also, if approximately 60 seconds have passed after copying is completed, or if the clear key 74, i! By pressing the I:11 key 72, the set number display and copy number display will automatically change to "
Return to 'Ol'. 88 is a -11] insert indicator, which lights up when the ;Ill] insert key is pressed and goes out after the 1, 1: insert key process is completed. 79 is a selection key for automatic (tζ light control mode (AE)). By pressing this key, the density adjustment lever 81 is disabled, and clear images without fog can be obtained for Hatake BX 8.H. 80 is an automatic duplex selection key, and one duplex phase intermediate tray 59
(See FIGS. 1(1) and U(2)) can be selected only when the main body device 100 and the veticle 200 are matched. 80 and 91 are LEDs (
light emitting diode), and is 1 year old and 8 years old while copying the "front" side.
0 and 81 are lit while the "back" side is being copied. Reference numeral 88 is a display device that displays the position of a paper jam (JAN) when it occurs, and uses nine LEDs to call the operator's attention. 89 is the intermediate tray 58 (Fig. 1 (1) and (2) valley j
There is a green LED indicating that transfer paper is available in the intermediate tray 58, and it remains lit as long as there is transfer paper in the intermediate tray 58. Figure 3 (1) shows the multiple Ij shown in Figures 1 (1) to (3).
This is a control circuit for the f device. In the figure, QI'O1 is a microcomputer (hereinafter referred to as a mask) that controls the main motor that executes the copying process, drives the 7-component voltage transformer, etc., and controls communication with other microprocessors. be. That is, the mask Q101 includes a ROM memory that stores the control programs shown in FIG. 4 (1) to (79), which will be described in detail later, as a command code routine;
A RAM memory that stores process timing data for sequence control, size data read by a cassette sensor, etc., and a CPU with ports, 0 ports, and 110 ports that control human output are integrated into a single chip semiconductor. This is an Enamp microcomputer made up of 4111. Q102 is the same as 0101, and is a one-chip microcomputer with 1-chip microcomputer, and the built-in ROM memory (not shown) has the information shown in Fig. 5 (1) to (8) and (+1) (described in detail later). Contains control programs. below,
This Q102 is called a slave. In addition, a Guinamink display unit 800 for driving each display of the operation unit (see Figure 2) is connected to ports 03 and 04 of the slave cJ102, and a pair is connected to the input circuit of each key.
5 key 1] Links 801 to slave 1,) l
O2's po]・Fjt is tangent to 12. Q103 is a 1-chip microcomputer equivalent to QIO+, and is similar to Betistar 20 shown in Figure H41 (1).
0 control. Hereinafter, this QI03 will be referred to as a pedestal controller. Then, by using serial communication with the mask Q101 installed on the main body side, the timing of tenki paper feeding and sequence control in double-sided copying mode are performed. In addition, the ROM built into Q103
A memory (not shown) stores a program number 1 (11th line) shown in FIGS. 6(1) to (11). Q104 is an A/D converter, and the temperature of the fuser heater can be adjusted by serial communication with mask Q101.
f Perform control. This A/D converter/hatter Q104 has four analog input lines ADIN, and )j! In addition to connecting the vaporizer thermistor 850, )・U1\heater temperature detection section, used toner check, check (waste toner box potential check) Ill cds, board 1
It is connected to Tammy's volume (these are not shown) which can be accessed at ゜. What is this A/D converter/hatter Q104 and mask QIOI? Similar to the serial communication between the slave Q102 and the master QIOI described above, serial communication is performed by a serial request from the mask Q101. That is, the mask Q101 is controlled by an internal timer (not shown) (interrupt every 16th time by the internal timer).
Capture one of the analog inputs as 8-bit data,
At the same time, specify the analog input channel of the A/D converter Q104. Q105 to Q107 are microcomputer QIOI
and expansion I to expand the input/output ports of Q102.
It is 10. The microcomputers that missed the top are connected by five serial transfer flVI control lines, and are controlled by the master QIOI. For example, master QIOI
Port 08 of the microcomputer Q102 serves as a communication request signal output terminal for the other microcomputer Q102. Then, the other party's microcomputer Q102 or 4
'i 'I' Upon completion of the preparation, the ENABLE even returns to port 12 of master Q 'l 01. After that, when eight serial clocks SCK are sent from the master QIQI, the contents of the 8-bit shift register included in the partner microprocessor Q102 and the 8-bit shift register included in the master QIOI are exchanged at the same time ( (See Figure 11). More specifically, as shown in FIG. 11, SO is the serial output data, and Si is the serial manual data 71j, and the serial output data SO is output in synchronization with the rising edge of the serial clock SCK. At the time of triggering, serial manual data Si is latched. The timing chart is shown in FIG. The communication timing between these microcomputers is managed by an interval timer when copying is not in progress. That is, as shown in FIG.
02 performs serial communication only once every 1.248 m5ec iO°, serial communication is performed with the petistal controller Q103 once every 4 times, and serial communication is performed with the A/D controller Q103 once every 16 times. Performs serial communication with the hater Q104. On the other hand, during the copy sequence, communication is performed with the petistal controller Q103 in synchronization with the drum clock.
The slave Q102 and the A/D controller Q104 obtain communication timing based on the above-mentioned interval timer. Next, we will explain the operation during double-sided copying in Figures 1 (1) to (3).
) and FIG. 2. First, when the automatic duplex selection key 80 shown in FIG. 2 is pressed, the LED 90 first displays that it is a "fall" side copy. Then, set the set number of copies using the copy number set key 7.
When the user manually presses the copy start key 70 from step 3, the "front" side is copied for the set number of sheets. The timing chart at this time is shown in the +tij half of FIG. 13 (4). The copied transfer paper is transferred to the flanper 3 of the switch pack section.
Due to the operation 3-1, the paper is not ejected from the main body, but is stored in the intermediate tray 58 through the transport path 57 on the pedestal 1 side. The paper size control board 56 of the intermediate tray is activated when the copy start key 70 is pressed in accordance with the paper size information sent from the master Q101 placed on the main body 100 side.
Start moving to . At this time, serial communication data (9th
After receiving PMSTSO bit b3 "Intermediate tray Ready J signal" shown in FIG. When retracting, the intermediate tray feed roller 51 is pulled upward by a solenoid (not shown). When the transfer paper enters the intermediate tray 59, the mask QIOI receives serial communication data (bit b4 of PMSTSO shown in FIG. 9(2)) from the slave Q'102. Then, the mask Q101 transmits the "intermediate tray transfer grindstone" data (see 7 takes l in FIG. 7) to the slave QI02, and the slave Q102 lights up the "intermediate tray transfer grindstone LED J 99 (see No. 21A). When the set number of sheets is stored in the intermediate tray 53, 1 main body + 0
Both the drive systems of 0 and pedicle 200 stop, and the copy table on the "front" side of the operation display section and the 1 Tenkawa LED 90 go out. And 3 LEDs for displaying the copy on the “back” side.
1 lights up. At this time, the upper/lower cassette, electrical selection display river LED9
3 goes out, and the transfer paper size display 82 82 displays the size of the transfer paper 7J stored in the intermediate tray 58. Therefore, subsequent presses of the upper/lower cassette and deck selection keys 75 are ignored. Automatic exposure (AE) selection key 79 and magnification setting key 78
, 77, and 78 can be pressed, and copies can be made at different magnifications on the "front" and "back" sides. However, there is no point in pressing the copy number cent key 73, and the number of copies stored in the intermediate tray 58 is displayed on the copy number display 87. When the copy start key 70 is pressed, the intermediate tray paper feed roller 5
1 is lowered by the action of a solenoid (not shown) and comes into contact with the transfer paper. Then, in response to the serial communication data sent from the master QIOI provided on the main body 100 side (the MpSTSO focus b "paper feed request" signal shown in FIG. 9 (1)), the medium 1141 tray 58
Start feeding paper from . The second half of the timing chart shown in FIG. 13(4) represents this sequence. When the "back" side is copied, the fixed 7I roller 31-1.
Paper is ejected through 31-2. Shigashi, sorter 40
If 0 is installed, flip the J and back sides and play #1. This is necessary to perform page alignment for side-by-side copying, and the reversing mechanism is called a switch puncture mechanism. FIG. 1(3) is an enlarged sectional view showing the switch puncture mechanism, as described above. As is clear from this figure, F-)
31-1 and 3 of the fixed number ``a-ra 31-1 and 3
The transfer paper that has passed through 1-2 is once transferred downward by the flapper 33-1, and when the trailing edge of the paper to be transferred is detected by the switch pack sensor 21), the reverse rotation roller 19
-8 is rotated by the solenoid 19-12, the flapper 33-2 is pushed down to the ejection side, and the transfer paper is ejected via the rollers 18-4 and 18-2. Thereafter, when the second switch pack sensor 21 detects the trailing edge of the transfer paper, the solenoid 19-12 is returned to the stop rotation side to prepare for the primary switch pack operation. In addition, in the double-sided copy mode, "Back" Merchant Marine n (time (when feeding paper from intermediate tray 59) and when feeding from deck
7) When feeding paper from
After the transfer paper reaches a predetermined position, the optical system starts running. As this timing signal, the "intermediate tray" tidy used when copying the "front" side in double-sided copy mode
J signal (Figure 8 (2) t small - iPMs Tso's signal
・Refer to bx). Sunawaji, pedicle 20
The time from the time when the transfer paper reaches a sensor (not shown) provided in the transfer paper conveyance path 58 of 0 to the time when it reaches the registration roller 15 is set in advance;
According to the first rule, "Intermediate tray Ready J signal is sent, and the main body 100 receives that signal) and starts scanning the optical system. Detection is performed while a paper feed request is being outputted.Then, even if the paper feed roller of the intermediate tray 53 or the 2000-sheet storage number pad 54 rotates and a certain period of time elapses, the transfer paper is not detected. If so, it is determined that a problem has occurred in the paper feed section. However, taking into consideration the fact that the conveyance of one paper is delayed due to slippage of the paper feed 111+, the transfer paper is set for twice the time that it should normally reach. By doing this, even if the transfer paper deviates to some extent, it is possible to prevent the transferred image from shifting and to reduce the occurrence of jams. In addition, the transfer paper was fed double at the time of "fall" side copying, and more than the set number of sheets were stored in the middle 117I tray 59.
If so, copy the "back" side at once [transfer the middle tray]
Signal (bit b4 of PMSTSO shown in Figure 8 (2))
is detected and there is no transfer paper in the intermediate tray 58.
Inherits the back side copy action. At this time, the copy count display 87 counts down from the initial set number, and stops counting when it reaches the count. Furthermore, if the transfer paper in the intermediate tray 58 runs out in the middle tray 58 when the paper is re-feeded and the set number of "back" side copies are completed due to middle feeding, the optical system is wasted. To terminate a copy operation without scanning. The "Back" copy display LED 81 lights up at the "Front J side copy end γ 118f" of the double-sided copy mode. At this time, if it is desired to cancel the "back" side copying, the stop key 71 can be pressed to eject the "down" side copy transfer paper on the intermediate tray 58. When the stop key 71 is pressed during "back" side copy standby, the slave Q102 controlling the operation unit (see Figure 2) sends an rsT to the master QIOI.
OP input” Jingo and “Double-sided mode back 5TAND-B
Send the YJ signal (see Figure 8). Thereby, the mask QIOI energizes the main motor control section 820 and turns on the registration roller 15. In addition, "Double-sided back mode standby" 1 is sent to the pedicle controller 0103.
(see bit b4 of fA'91<(1)), "paper feed riffist J signal," image tip J Cj number (Fig. 9 (
D MPSTSO (7) bit b: (see b4) is sent unconditionally to cause the copy transfer sheets stored in the intermediate tray 58 to be sent out one after another to the main body side. On the main body side, the scanning of the optical system is stopped, one development bias is set so that toner does not adhere to the photosensitive drum, and only the blank exposure lamp is turned on. do. At this time, if the sorter 400 is installed, even if the sort mode is selected on the sorter side, the master QIO will unconditionally send (1) to the non-sort bin 62.
Direct from I to QI08. Next, an explanation will be given of the interrupt processing when double-sided printing is performed. I+4 iiM & Interrupt key 72 while in photo mode
Press to pause the currently running operation mode. Then, the data that has already been set, such as the set number of copies, selection of the center, copy magnification, AE/MANUAL selection 9 double-sided "Front"/"Back" mode, etc., is saved, and the old 1 entry indicator 88 is turned on. . It then waits for a new key to be pressed. However, only when the selected cassette size and the size of the transfer paper currently in the intermediate tray match, the double-sided copy mode can be designated. At this time, since the copy transfer paper before drowning is stored in the φ inter-tray 59, the number of double-sided copies that can be set in the 1-interrupt mode is determined by the number of sheets stored in the intermediate tray 59 starting from the maximum number of sheets stored in the intermediate tray. This is the number obtained by subtracting the current number of sheets. For example, if the maximum number of sheets stored in the intermediate tray 59 is 98 sheets, and 30 sheets of "front" side completed copy transfer paper are already stored in the intermediate tray 59, one
It is possible to set the number of double-sided copies up to 89 sheets. Note that the transfer paper already stored in the intermediate tray 59 before the interrupt is not affected by the 5-interrupt process. This is because the transfer paper whose "front" side has been copied by the interrupt processing is simply placed on the top of the intermediate tray 53. Thus, when the duplex copy mode is designated in the I or I interrupt mode, the previous copy mode is automatically returned after the interrupt duplex copy is completed. 1. When double-sided copying is performed using the 111 deep copy mode, the copy paper is placed in the non-so I bin 62 (
(see 1st W (1)). At this time, even if the sorting mode has been specified on the sorter side, since the non-sorting (4rN) S is sent out from the main body side, it will always be discharged to the non-sorting bin B2.Next, the temperature of the fixing device The adjustment will be explained. As shown in FIG. 3 (1), the analog signal from the fixing thermistor 850 is introduced into the A/D converter Q104,
/D conversion. Then, the digitized temperature information is sent to the master QIOI via serial communication, and the temperature of the fixing device is read. After the power is turned on, when the temperature of the fixing device reaches 150°C, the fixing rollers 31-1, 31-2 start rotating at low speed,
When the temperature reaches 170°C, it rotates at high speed and enters the static state. The sequence is as shown in Section 131 (1). During standby, the temperature is controlled to be maintained at 180°C, and when the temperature of the fixing device falls below 150'O, copying operations are disabled. Generally, when copying is performed continuously with a large hole, the heat from the fixing device is absorbed by the transfer paper, so the temperature gradually decreases. Therefore, when the temperature of the fixing device falls below 180° C., control is performed to increase the copy interval. In other words, the interval at which the optical system is driven is increased to reduce the amount of transfer paper passing through the fixing device. The optimum value of the timer used to set this interval is selected so that the temperature of the 5-fixing foil device rises. When the temperature rises to 170° C., (1) the original sequence is restored. The operation sequence when feeding paper from the number pad 54 (see FIG. 1 (1)) will now be described. The turn-on/off of the second/lower numbers and the paper feed roller are controlled by the Betistar controller Q103. In the Kio embodiment shown in FIG. 1(1), the transfer paper placed on the lifter 54L is controlled so as to contact the paper feed roller 50 with a constant pressure of 1.15. When it becomes necessary to raise the lifter 54L during the copy operation, send the "Tenki LiFT LIP request" number 1 (see Figure 9) from the pedicle controller Q103. Master Q10
Serial transfer to 1. Then, the master Qltll stops the flow to the fixing heater and also
Lower the FT UPiNHiBiT J (see Figure 8 (1) 2 MPSTSOc7 Hin bb5) to a low level, and increase the lift door of the deck 54 to +'+11r with respect to the petinutal 200. When the lift-up of Tenki is completed, Bedicle 200 will send "Tetsuki LiFT UP request".
Turn off 5'f. Based on this, the master QIOI resumes temperature control of the heater. When using deck paper feeding, it is necessary to lift up the paper approximately every 30 sheets. Further, the time required to lift up the tenki is approximately 0.8 seconds. Therefore, even if the fixing heater is turned off for about 0.8 seconds during continuous copying,
Temperature control will not be affected at all. In the embodiments described above, temperature control is performed by serial communication between l microcomputers, or by control by one microcomputer or by hard logic as shown in FIG. 3 (2). Control is also possible. FIG. 3 (2) shows a bar (logic) for turning off the fixing heater at the lift-up 1111 of the number key 54 (see FIG. 1 (1)). Here, the number key lift (fj
No. 140 1 is the pedicle controller y Q
The signal is sent from the deck 1 lower control circuit 861 connected to the deck 103. And this Tenkirito 2 signal -140
-1 is connected to the fixing heater-on 1 and -1 through the in-hark 140-2 together with the and-key 1-140.
-4 will be introduced. Therefore, when the numeral lift signal 140-1 is at a high level, the numeral lift motor is driven. Since the fixing heater is turned off at j-, the increase in power consumption of the entire copying machine is suppressed. In this way, it is possible to turn on and off the upper heater for 11 seconds using heart rate synchronization without using any other processor. FIG. 3(3) shows the circuit configuration of the AC controller. The AC drive control of this copying machine will be explained below using this figure. The outlet P1 is connected to the main switch SWI via a line filter LFI. Furthermore, the microswitches MSI and MS2 are sunk in the front and rear door sides. Therefore, when JL and A are opened, the AC will be turned off manually. The old one shows a drum heater, and Dorato's temperature is 1! ii. Further, H2 and H3 respectively represent a 1° heater and a lower heater of a constant 1j device. FMI, F to 2 and F
M3 indicates a transfer fan, an optical path/system fan, and a υ4-I heat fan, respectively. The main motor for moving the M-th fm feed system driver t\
LAI stands for halogen lamp. The output side of the transformer T1 is connected to the DC' source circuit. Also, the old main motor of this copier is A<'” fir
Multiple jetl+! High-speed rotation is performed at j, and low-speed rotation is performed at 9 o'clock in reduced duplication. Therefore, the mask QIOI (third
The main motor is equipped with a drive unit that receives the flu control signals DRMD, H and DRMD from the main motor shown in FIG. )'54 Figures (1) to (7th) are flowchart 1 showing the control procedure of the master Q101. First, the explanation will be given sequentially starting from FIG. 4 (+). In step S4, the RAM port is initialized. That is, the data RAM and I10 port are initialized at power-on. Step S8 is a processing program for applying manual power to the manual port, and step S8 is a monitoring program executed when the optical system returns to its home position. The steps after step 510 are called a status program, and sequence control is managed using status numbers. That is, in step SlO,
The ``Status Load'' is a 6-taste feature that calls out the corresponding status number. Thus,
Step S12 to S30, 71'< in the process,
Things are becoming more and more divided. Step S12 is a processing program that determines whether or not the main unit is powered on; step S14 is a standby processing program that runs from turning on the heater until it reaches a certain temperature;
Steps S1B to 520 are processing programs for flj:4i''l control rotation. Step S22 indicates a standby loop. That is,
This is a processing program that waits until a predetermined temperature is reached, the potential control rotation ends, and the copy start button is accepted. Step S24 executes a processing program and its potential control processing that are performed when the copy button is pressed down. Step S26 is an AE control push program to be performed thereafter. Step S28 is a processing program for actually executing copying, and step S30 is a processing program for performing post-rotation. Next, the time interval /(ru(Ti) shown in FIG. 4(2)
NT) will be explained. The master QIOI is interlaced with an internal timer every 1.248 milliseconds. Step S3
8 performs serial communication output processing that is performed every 1.248 milliseconds. In step S40, this subroutine for each predetermined verse interval is processed. That is, if you want to do something after a certain period of time has elapsed from a certain process, this subroutine allows you to set the timer in the main routine and perform the process in a single step. 5iNT shown in FIG. 4(3) indicates a serial reception interrupt. Is each step from step 538 to S40 a serial communication from slave Q102? , Is it serial communication from the peticle controller Q103? , A/
Serial communication from 104 to D controller 8? Judge that. In this way, the storage location is determined according to each received content (steps S42, S44.84B). That is, a process is performed in which the reception take is set in each area based on the status or address number. In Figure 4 (4), the optical system registration interrupt (iNTl)
Perform processing. Pulses sent from an encoder (not shown) connected to the drive motor of the moving optical system are received to determine whether the moving optical system moves forward or backward (steps S52, S54). Nowadays, if the moving optical system is advanced, step S
At 68, the counter (+ri) is incremented by 1. Therefore, by monitoring the value of this counter, the reversal position of the moving optical system can be known. At step S?0, the registration timing is determined. That is, In this step, the timing to actually feed the paper is determined.Then, when the leading edge of the original reaches the stop position, the transfer paper and the leading edge of the original are aligned by tightening and turning on the REGISTER! ear latch. (Step 572). If the moving optical system is moving backward (Step 554), it is determined in Step S58 whether or not the AE scan should be carried out. If NO, the AE redundancy measurement is stopped and step S58 is performed. 558), and if YES, the counter is incremented by 1 (step 560). When the count value of this counter reaches 6, Stella 7'
At S84, an optical system stop request is set and the process ends. In 1NT2 shown in FIG. 4 (5), the drum clock is included. That is, this is a processing program that detects the drum clock generated by rotating the main motor and counts it one clock at a time. In step S78, an area called drum counter is set to 1.
It increases by 1 for each interrupt. Then, in step 580, clock timer processing is performed. From Figure 4 (6) onwards, more detailed processing steps are explained.
<I'm going. In step S8e, data to be sent to the slave Q102 is set (intermediate tray presence/absence set). In step S88, it is determined whether the 24-Hold power supply is on (main switch is on). Note that when the main switch on the main body is turned off, the microcomputer itself remains in operation, but the 24 Holt system is turned off. In step S90, jam detection is checked. When the power is turned on,
If there is still some transfer paper left in the sensor area, it may be a jam or it has not been completely cleared. In the above cases, it will be treated as a serviceman call error.
Control is transferred to 5VERR (SV error) and the operation of the main unit is stopped. Then, a serviceman call is displayed on the display.6 For example, if the thermistor that detects the temperature of the fuser is disconnected, the fuser itself will burn, so as soon as a disconnection is detected, all outputs are turned off and a field called rEOOJ is displayed. Displays lightning occurrence. In step 596 (control counter check), it is checked whether a key counter (also called a control counter) provided in the main body of the copying machine is inserted. Therefore, when this counter is removed during copying, the copying operation is stopped. Step S98 is the pedicle controller Q103
Indicates the sending program to. In step 5100, input to the data DB (ie, manual input to the port) is performed. In step 5102, the A″ disk controller Q103 is transmitted.
It is the same as the case of 102. The reason is step s+
oO (This is because a large DB input takes some time, so it is necessary to use such a processing procedure. In step 5104, human power is applied to the I10 expander (i.e., expanded Ilo Q105, QloB, etc.). In some cases, it may take some time, so step 5
At 10B, send the pedicle controller Q103 and perform step 1. If step 5108 and 5ILO, step 510
Extended I10 input processing is performed in the same manner as in step 4, and in step 5112, the bed controller Q1 is inputted again.
Send to 03. At step 5114, a home check of the optical system is performed. That is, during the copy sequence, the optical system moves backward and returns to the home position. , is a program that checks whether or not the Step 5118 checks the size of the paper cassette. In step 5118, switch/henk processing (;4'+
Jl (see Figure (3)). Here, the switch puncture process refers to the process of reversing the copy paper when it is fed out to the sorter after the "back" side has been copied. Thereafter, in step 5120 shown in FIG. 4(7), the process moves to each status process. It has 10 statuses (STS) from 5TSO to 5TS9. ``Status upper 4 bits lower'' in step 5120 means loading the 3rd place 4 pins of the area called STS (8 pins).
...I'm tasting it. In this way, before jumping, 1
- place 4 Bitrot. Then, depending on the contents of the "Nii☆4 focus," jump to one of STS O to 3. In step 5122 (see FIG. 4 (8)), the lower 4 bits of the status STS are loaded. And the bottom 4
Jumps according to the contents of the bit. In addition, since this area called STS is cleared at the time of telegram posting, the player starts from status 00. In step 5124 (see FIG. 4(8)), it is determined whether the 24-volt system is turned on. The microcomputer itself does not stop operating even when the main switch is turned off, and is activated simply by plugging the copier's power plug into an outlet. 24 When Porto system is on, step 5I2B
(Jam Killer) Here, it is determined whether the dip switch for performing the jam detection operation is in a position that does not cause jam detection. Therefore, in the case of YES, the operation of the JAN detection sensor is stopped. On the other hand, if the answer is NO (that is, if the sensor is activated), it is determined whether or not the transfer paper is caught by the sensor. Here, if the transfer paper is stuck, the position of the jam is set and displayed. Step 5I44 of status 5TSO1 (Fig. 4 (1)
0)), it is detected whether the power is turned on. When the power is on, a "power-on status transmission request" is sent to each microcomputer.
Step 5148) Send J. That is, the lower bit b of the status O transmitted from the master Q101 to the slave Q102 ((1) in FIG.
(see step 5146). In step 5148, “00
” is inserted. The 5TSOL mentioned here is a processing program that is executed when a jam occurs once. Next, status 5TSIO (see FIG. 4 (12)) will be explained. In step 5152, the jam data is cleared, and in step 5154, the jam flag is reset. In step 515fl, the above-mentioned transmission data (seventh [
Set bit b, ) of status 0 shown as (+). In step 3158, the presence or absence of a jam is notified to the pedicle controller Q103. Step 5160 is a processing program that performs potential control (measuring the surface potential of the drum and controlling the charger, exposure lamp, developer, etc. in order to obtain the best image). Here, DV bias means "developing bias". In step 5162, the lower heater of the fixing device is turned on. Further, in step 8164, the upper heater of the fixing device is turned on. Then, in step 918B, a four minute timer is set. This determines whether the thermistor used to detect temperature is a personal one or a stand. Thereafter, control is transferred to status 5TSII (step 5188). In the status STS I 1 shown in FIG. 4 (13),
First, it is detected whether the temperature of the fixing device has reached 150 degrees (step S1?0). However, if the temperature does not reach 150°C even after 4 minutes have passed (steps S1 to 2), it is determined that the thermistor is disconnected and a serviceman call error (EO) is displayed.
Step 5174). Then, all functions at each port are stopped. When the temperature of the fuser reaches 150° C., step 5176
This is the same as "jam kill" and controls the state of the miscellaneous kill setting switch. Here, other killing methods include, for example, paper-free killing, developer-free killing, and the like. In normal case r NO
J, so in step 5178 it is determined whether the "rear door" is open or not. After this, the door cannot be opened by general users, but may be opened by service personnel. However, when the temperature of the fuser reaches a predetermined value, the main motor automatically starts rotating, so if the rear door is opened, from the perspective of safety prevention 11.
It is necessary to complete the process without rotating the main motor. Therefore, in step 8180, a flag indicating that the wait has been completed is set, and control is transferred to status 5TS46 (step 5182). If iQ< F is closed, step 518
4, potential controlled rotation is performed. After setting the developing bias to a predetermined bias value, the main motor is rotated at a low speed (step 5186),
Turn on Resist Crunch (Step 0S188)
. Then, turn on the front lamp and step forward. 5190), turn on the heat fan 5192), and perform blank exposure (step 7'519).
4). In step 5196, the small flag is set to indicate that the drum is rotating, and in step 5198, the drum clock is set to 11. In order to read the information, reset the flow knob. Step 5200 turns on the secondary product pressure, and step 52
02 is the drum clock count ((i ri 1 noa,
Step 52041 This is a processing program that sets the next status code (sTS-12). Next, the status 5TS12 + shown in FIG. 4 (14)
Let me explain in detail. In steps 5206 and 5208, the control is checked and control is transferred to step 5210. That is, the number of tram clocks (f+) caused by the rotation of the main motor is counted (see 1NT2 shown in Fig. h'64 (5)). In step 5210, the secondary high pressure is turned off, and in step S2+2, a 3-minute timer is set. Using this 3-minute timer, it is determined whether the temperature of the fixing heater reaches 170°C (see Status 5TS13). In the status STS+3 shown in FIG. 4 (15), first, in step 5214, the temperature of the fixing heater is adjusted by 1j. Next, in step 5216, the fuser 11. ＾It detects whether the temperature of the melon has reached 170℃. However, if the temperature does not reach +70°C even after 3 minutes (step 5218), a serviceman call error message is displayed. If the fuser heater reaches 170° C., in step 5222, the low speed rotation of the main motor is turned off. In step 5224, the lower fixing heater is turned off. After that, control is transferred to status 5TS20 (step 5
228). In the status 5TS2 shown in FIG. 4 (18), first, ? The temperature of one vessel is controlled (step 5228), and the status is set to 5TS according to the lower status [・].
20° Branches to 5TS21 and 5TS22. In status 5TS20 shown in h'54 figure (17),
First, send a lens same-magnification request to the slave Q102.11. (See Figure 7 (2)). Next, in step 5234, a 30 millisecond timer is set. Due to this time difference (30 milliseconds), the slave Q102 waits for the communication to be completed in the evening. Then, after 30 milliseconds have elapsed, 21 is stored in the next status STS area (step 5236). i4 In the status 5TS21 shown in FIG. 18, step 5238 detects the timer completion r. This is a step in which it is determined whether the 30 millisecond timer set by the status 5TS20 has completed timing. When the 30 millisecond time measurement is completed, the process proceeds to step 5240 and subsequent steps, and the potential control rotation is Q-+. Here, r Vo,
V, Curran 14 times set” means ++74 part 11!
, the position VD, and the bright area potential V1 are detected, and the number of times of position control is set to 4 using the output. In step 5242, the developing bias is set, and in step 5244, the main motor is rotated at -11 speed. In step 8246, the primary and secondary IH pressures are turned on, and in step 5248, the separation high pressure is turned on. , Ste.
Step 5250 turns off the drum heater, and step 525
2 clears the drum clock callan h inn. In step 5254, it is determined whether the moving optical system is in position or not. If the moving optical system is not at the home position, the optical system reverse clutch is turned on in step 5258L, thereby returning the moving optical system to the home position. Then change the control to status 5T
Move to S22 (Stella;/5258). In the status 5TS22 shown in FIG. 4 (18), the time point at which a drum click or 188 clock is generated is first detected (steps 528fl, 5282). When the 16S clock is detected, step 5213 clears the count value of the side tram clock.
4) Move to status 5TS30. In steps 5272 and 5274 of status 5TS30 (see FIG. 4 (21)), it is determined whether 150 drum clocks have been generated. And 150
If a clock is detected, step 527
Turn on the lamp/heater switching relay. The lamp here refers to a halogen lamp, a heater and a li lamp.
Means a fixing heater. Turning on this switching loop means setting the relay contact to the halogen lamp 1114. However, at this stage 1, the halogen lamp is still on and there is no zero). In step S2?8 (VIL set), the black exposure lamp is turned on intensely, and the table jr1j corresponding to the bright part of the photoconductor is set.
This is a processing program that measures %. In step 5280, the 1st value of the drum clock is cleared, and the process moves to the next status 5TS31 (step 3282). In the status 5TS31 shown in Fig. 4 (22), it is determined whether 7 tram clocks have been detected (j).
Step, Pu 5284.5288). Is it a drumstick?
If the blank exposure lamp is detected, the blank exposure lamp is turned off in step 5288i/) and the blank exposure lamp is turned off in step 5288i.
At 80, the count of drum sticks (+l+ is cleared. Then, control is transferred to status 5TS32 (step 3292). In status 5TS32 shown in FIG. 4 (23), when 150 drum sticks are detected (step 529)
4.5296), the dark area potential VoMm is determined (steps 5298, 5300), t, v, Senl-Cr Similar to step 5278), a processing program for measuring the surface potential (potential of the dark area) Set the command for. In step 5302, l is deleted from the vO+veL counter Seratoi 1-I (see step 5240). Therefore, since these counters are previously set to r4J in the status 5TS21, the status 5TS33 (step 5308) is actually repeated four times. Then, after completing 4 loops, the status will be controlled to 5TS40 at 7 tenbu 8306.
Send a message. In the status 5TS33 shown in Figure 4 (24), 71
Stenbu 531 that takes out 4 drums of 1111
0°S 31.2), turn on the blank exposure lamp step 5314), count 1 of I.
``CLEAR I WHITE STEP 5316''), transfers control to status 5TS3Q after 7. Then, Vo, V
, position control by L? :Status 5 until completed 4 times
Repeat TS30-33. Then, when the VD+vK potential control is completed, the process advances to status 5TS40. In the status 5TS40 shown in FIG. 454 (26), first in step 5324 it is determined whether the moving optical system is at the home position. Then, the moving optical system nozzles to the home positions i and yl7.
If the vehicle is moving backwards, in step 5332, it is determined whether the vehicle is moving in autumn, in dynamic gear, or in reverse. I am being followed.
If the optical system (shield
Launch the IL/) and set the optical system to the home position 11.i. When the moving optical system is at the home position, the rim 53
At step 26, turn on the sea light lamp and look at the marker 1i1 and the white plate 70.1. Irradiate with the light layer and set VL+count to 3 in step 5328. This is number two,
Surface potential i! of standard bright area potential VLI! 3 times 11
It will be Rikoto. Then, control is transferred to 5TS41 (STE). 5330) - Status 5TS41 shown in Figure 4 (27), ■
81) Detect and detect tram clocks 7'33
38.5338), and then in step 5340 it is determined whether the Lenz movement is complete. Namely. Check whether the zoom lens is at the same magnification position as j+l 1r
Lit-ru. If it is at the same size, step 5
At 346, the vL engineer is sent. That is, ff
? Measure the surface potential of the bright area. In step 5348, the drum clock count (1
7j is cleared, 42 is stored in area STS, and control is transferred to status 5TS42. In status 5TS42, 157 drum clocks are detected (steps 5352, 5354), step 53
At 56, 1 is subtracted from the 'j Ll count. already,
Since the VLI count contains "3" or cents, this loop will be repeated three times. In step 5360, VIJ is set to measure the surface potential of mark 1 on the surface of the photoconductor.Then, control is transferred to status 5T543 (step 53Ei4). ni, J\su status 5TS
In Step 43, first, seven tram clocks are detected (Step 53H), and in Step 5370 after Step 7, it is determined whether the copying operation is in progress (?). If the copying operation is not in progress, the process moves to Step 5372. Turn off the ly-light lamp. Next, turn off the "way) complete" signal, step 5374), and turn off the primary high voltage, step 5371.
3) Turn off the transfer high pressure step 5378), (・
A clear step on Ramkronk's Karantoi 1 white. 5380), transfers control to status 5TS44. In the status 5TS44 shown in FIG. 4 (29), 14
After counting drum clocks (step 538e)
, 3388), and switches the heater relay to the lower heater side (step 5390). In step 5382, the separation high pressure is turned off, and then the step
Step 5384 clears the tram clock to 11, and step 5396 stores 45 in area STS. In the status STS 45 shown in FIG. 4 (30), 14 tram clocks are first detected in step 5398.
．． 5400), and in step 5402, one constant heater is turned on. In step 5404, the rotation of the main motor is stopped. Then, in step 8406, [l・Rano, l]
N1112 lag'' is turned off, and the front lamp is turned off in step 8408. In step 5410, the resist flange is turned off, in step 5412, the developing bias is set to the main voltage, and in step 5414, the secondary high voltage is turned off. After 7, in step 5416, 46 is added to the area STS.
and transfers control to status 5T34B. Status 5TS48 shown in 2l'y41+(31)
Then, in the second step 5418, the one minute flag is turned off. That is, surface '1ljj☆-e 1. When setting ll+, the time 5"j principle must be yellow, because the number of times the "1v, digit 1lIII control is performed varies depending on the h9 setting time of the device. Therefore, step 542
In step 2, set the 1 minute timer. Control J(1 to status 5TS50)
step 5424). Status 5TS5 shown in FIG. 4 (32) is a standby routine. First, in step 5426, a check is made for toner par I: and waste toner jd. In step 5428, a jam check is performed, and if the jam is detected by the N1 sensor or the paper discharge sensor, a paper jam is detected and a jam flag is set (steps 5430 and 5432). Step 5434 adjusts the temperature of the fixing device.
Turn the heater on and off so that the temperature is 180 degrees. 2I-, Step 5440 (Reditche, ) 1) enqueues various states '81L; For example, if you are 1 year old, you may have a key count. This indicates whether the copy is in a state where it can start copying.
□・C4・Check7. In step 77'5442, the speed control input 1 of the W feed motor for the intermediate tray is sent to the A' diskle controller Q103.
111.1-Send the same. This makes it possible to synchronize the rotation of the main motor. The speed control of such a motor +1' [is, Fig. 9 A, 1)

[−
Luna MPSTS2 IfA lower biyl b, (motor
LIJνJ/old G II, +9 makes it worse. At snap 5444, it is determined whether or not to use the IIL source autochan. However, if no operation is performed for approximately 21Rr after the end of a copy/first masterpiece, the main switch is automatically turned off. It is determined in this step whether or not the auto-shutoff function should be executed. If it is determined that the main switch should not be turned off, it is determined in step 5446 whether it is in the ready state or not. Res. Condition 1! ! , the press of the copy start key is checked in step 8448. If the copy start key is pressed, step 8450 is performed.
54 M (see (33)), the set number of sheets is notified to the pedicle controller Q 103. - If the copy start key is not pressed, return to the main routine. Next, in step 5452, the communication 1) data to the pedicle controller Q103 is initialized, and in step 54
In step 54, set the "copying flag".
At 456, it is determined whether the mode is double-sided copy mode or apricot mode. If it is the double-sided copy mode, the intermediate tray is used, so the pedestal controller Q103 is checked for abnormality/correction (step 5458). If there is no abnormality, it is determined in step 5460 whether the "fall" side copy mode is 1. When copying the "front" side, it is checked whether there is any rolled paper on the intermediate I-lay (step 5482). That is, if the 11'/ζ copy paper is already stored in the intermediate tray, the 11th stitch 3141y cannot be moved, so the presence or absence of the transfer paper is checked in this control step. If there is no transfer paper in the intermediate tray, step 5464
In this case, a standby signal for the pedicle controller and roller 103 (FIG. 9 (1) MPSTS14>:
Set gj(+,). When feeding 1+ sheets from the 2,000-sheet storage deck, a deck drive request is set for the pedicle controller I/roller Q103 in the Stella 7' 5468 (see FIG. 9 (1)). In step 5470, it is checked whether the size of the transfer paper is A3 size. In other words, since the sorter of the copying machine according to this embodiment can only sort up to the maximum B4 size, when A3 size is specified,
Discharge to the non-party sorting bin unconditionally. Therefore, if it is determined in step 5470 that the size is A3,
In step 5472, a non-sort request is set (see Q108 shown in FIG. 3(1)). In step 5474, a pin cam return signal BCR is set for the sorter. As a result, the elevator for discharging sheets to a predetermined bin provided on the sorter side is returned to its home position. In step 8476, gto8 (see FIG. 3 (1))
The "sorter on" signal is sent to the machine to turn on the transport system motor. That is, this is a command to turn on the conveyance system motor in order to discharge the paper. Thereafter, 60 is stored in area STS and control is transferred to status 5TS80 (step 547B). In status 5TS80 shown in FIG. 4 (35), first in step 5486, a separation fan (a blower fan for peeling off the transfer paper from the photoreceptor) is rotated at high speed. Note that the separation fan is rotating at a low speed throughout step 548.
At step 8, it is checked whether the main motor is rotating at high speed or at low speed. The rotational speed of the main motor is determined by the copying magnification; it rotates at high speed when the magnification is 80% or more, and rotates at low speed when the magnification is less than 80%. Depending on the rotation speed of the main motor, the process branches to step 5484 or 5480, and the developing bias value is changed. In step 6498, the "r drum φ on flag" (a flag similar to jj3 indicating that the drum is rotating) is set. ``Thereafter, in step 5506, it is determined whether the moving optical system is at the Bohm position. If it is not at the Baum position, the optical system is moved backward after completing the lens movement (step S5508) (step S510).
). The separation fan is turned on again in step 5512. In step 5514, the lower heater of the fixing device is turned on, in step 5516, the resist crunch is turned on, and in step 5518 (blank Φ all on), all lamps for erasing the surface of the photoreceptor are turned on. Next, in step 5520 shown in ff'4[Δ(36), the primary/'F+ pressure (1-IVT) and the secondary high pressure are turned on. In step 5522, the high voltage for PO8T, separation and transfer is turned on. In step 5524, the drum color is cleared, and in step 5526, the copy magnification is set to 1.
1 (Check whether it is the same as once. This is to control the surface potential according to the high-speed or low-speed rotation of the motor, that is, according to the magnification.) If the magnification is not the same as the river rotation. has status 5TSf
(Transfers control to l. If the magnification is the same as the previous time, the time elapses at step 55.
Check at 28. This is because the amount of charge on the surface of the photoreceptor changes over time, and the method for measuring the surface potential varies depending on whether it is within 1 minute or more than 1 minute. In step 5530, it is determined whether automatic exposure (AE) is being performed. This is because the sequence behavior changes depending on whether it is AE or not. In the case of AE, 70 is stored in area STS and control is transferred to status 5TS70 (step 5534). In the status STS[l I shown in the 41st iN (37), the IH drum clocks are checked (step 5538.553B), and then it is checked whether the moving optical system is at the home position (step 5540). If the moving optical system is in the home position, the area STS
Stores 62 in and transfers control to status 5TS82 (
Step 554B). If the moving optic is not in the home position, step 55
At step 46, the optical system is moved backward. In the status 5TS62 shown in FIG. 4 (38), it is first detected that the moving optical system has reached the home position (step 5552), and then it is determined whether it is in the "back" mode (step 5554). ). If it is not in the “back” side copy mode, step 5556
At this step, it is determined whether or not the paper is being fed from the deck (feeding from the 2000-sheet storage deck 54). If deck paper feeding is to be performed, in step 5558, a message is sent to the pedicle controller Q103 to send the paper feed list J (MPSTSO shown in FIG. 8(1)).
reference). In step 5560, all blank light lamps are turned off. Step 5562 is a control step to determine whether the mote (magnification) is the same as the previous time. If the mode is the same as the previous time, processing from step 5570 is performed. Also, if the mode is different from the previous one, step 5564
Clear I. Ramkronk in step 556
6, set the VD, V, and L counters to n+1 (here, the maximum value of n is 4), step 5568
63 is stored in the area STS)' Figure 41 (3
In the status 5TS63 shown in 8), first check the 150 i-ram clocks in step 55713,
55130), and then starts measuring the bright area potentials V and L of the photoreceptor (step 5582). Then, in step 5584, the tram clock is cleared, and in step 8586, the area STS is cleared.
Store. If the status 5TS64 shown in FIG.
580), turn off the bra/reseller lamp step 55
92) Clear the drum clock step 558
4) , store 65 in area STS, 1 no I iF
Move D to status 5TS85 (step 5596
). In the status 5TS65 shown in Fig. 4 (41), first clear the count fi/f of 150 drum clocks (step 5598.5600), and clear the count value of the l.ram clock (step 5f102). Later 11t16R-IIL V. Start measuring (
Step 56o4). That is, in step 5804, a moat is set to A111 to determine the potential at dark y:1+ on the surface of the photoreceptor. In step 3606, 1 is decremented from the previously entered VD +Vi counter. Therefore, Takeko's step is passed the previous four times. When each is finished (Step 5808), the lamp/
The heater switching relay is switched to the lamp side (that is, the halogen lamp side) to turn on the halogen lamp (steps 5810 and 5812). After that, 4 to area STS
0 is stored and control is transferred to status 5TS40 (step 5814). In step 8616, 66 is stored in area STS and control is transferred to status 5TS68. In the status 5TS13G shown in FIG. 4 (42), first check the seven drum clocks in step 561.
8,5t320), and the blank exposure lamp is turned on (step S[122). After that, clear the count value of the drum clock (step 5824) 1. 63 is stored in x rear STS and control is transferred to status 5Ts63 (step 518);
Then, the statuses 5T983 to 66 are repeated until the counter noise ljj becomes 0. In the status 5TS87 shown in FIG. 4 (43), first check the 180 drum clocks.
28.5830), step 5t to start VLj measurement
(32) , Tramklong's Karan [・Sen is cleared step 5834), area STS + 68 is stored and control is transferred to status 5T988 (step 583B). Status 5TS88 shown in FIG. 4 (44) is a status branched from step 5384 shown in FIG. 4 (28). First, the count 1'I11 of the seven tram clocks is checked (steps 8838, 5840), and then the count value of the tram clocks is cleared (step S
6'42). 9 more, in step 5844 EMo 1 - Force 1
, determine whether or not the AE mode has been destroyed, and if not, proceed to step 5848 (status 80);
When in mode, step 364B (Status?+)
Move system 1i11 to. Status 5TS7 shown in FIG. 4 (45) is AE(+
This is a sequence for performing a dynamic exposure exposure adjustment scan. Here, automatic exposure adjustment is a sequence in which the density of a document is once measured in order to always obtain a clear image for any document. and, /
The light amount of the halogen lamp 40 for exposing the jH;j document is determined according to the document density added by 1I11. In status 5TS70 shown in p4 figure (46),
First, step 565 detects 30 drum clocks.
2.5854), and then checks whether the moving optical system is at the home position (step 565B). If the moving optical system is at the home position, the halogen lamp/heater switching relay is set to the halogen lamp side (step 3858). After that, when feeding paper from Teggi (step 51360), send ``r paper feed request'' to the petistal controller Q103.
(step 5882). If the moving optic is not in the home position (step 68
58) After the lens has completed moving to the predetermined position 1'4 (step 58e8), it is checked whether the moving optical system is moving backward (step 5IO). and,
If the moving optical system is not moving backward, the optical system backward clutch is turned on (step S8?2). , d4 In the status 5TS71 shown in FIG. If detected, the optical system is activated (step 5880) and the internal flag "E scan in progress flag" is set to r (step 5682).
In step 8684, the lamp/heater 9J exchange relay is set to the lamp side. Then, in step 5686, the halogen lamp is turned on. The lighting pressure of this halogen lamp is changed by a microcomputer. In step 5688, a reference lighting voltage is output in order to obtain a constant light velocity for AE measurement. Step 5680 turns on all blank eight-light lamps, stores 72 in area STS, and returns control to status 5.
Transfer to TS72 (step 5692). In status 5TS72 shown in FIG. 4 (48), it is checked whether the moving optical system has reached the A4 size position or not. This is determined by monitoring the counter in step S68 shown in FIG. 4(4). When the moving optical system is moved to the A4 size position (
step 5894), step 5700
411+ start setting. In step 5702, the forward clutch of the moving optical system is turned off. Then, in step 5704, the "optical system advancing flag" is reset. This means that the forward movement of the optical system is complete. Thereafter, the count value of the drum clock is cleared (step 57o8), 73 is stored in area STS, and control is transferred to status 5TS73. In addition, if the moving optical system has not reached the A4 size position, check whether the optical system timer (set when moving forward) has finished timing (step 5896). If the size position is not reached, a serviceman call error is displayed as an abnormality (step 9898). Status STS shown in FIG. 4 (48)? In step 3, control is transferred to status 5TS74 without executing anything. In the status 5TS74 shown in FIG. 4 (50), seven drum clocks are first detected (step S7+2,
5714), then turn on the optical system reverse clutch in step 5711(), and turn on the drum clock run l-(i
Clear ri (step S?+8). In step 5720, the AE drum counter is cleared. From this AE todrum counter, the length of the AE measurement performed while the optical system is moving backward is checked. After that, store 75 in area STS and control to status 5TS75.
Move j. Status ST'S? shown in FIG. 4 (51)? In step 5, it is checked whether the moving optical system is at the A4 size position again (step 5724). Does this mean that the optical system returns to the A4 size position due to the backward clutch activated to cancel the influence of the inertia of the moving optical system that has passed through the A4 position? This is to check whether If the moving optical system returns to the A4 size position,
Clear the todrum counter for E (step 5726)
, control status STS? Move to B. Further, if the moving optical system does not return to the A4 size, an error has occurred and 168 drum clocks are first detected (steps 5730 and 8732), and then "Serviceman call error 82" is displayed. Here, 82 is a code indicating an optical system abnormality. In status 5TS7G shown in FIG. 4 (52), it is checked whether the moving optical system has reached A4 size l'6. Therefore, in this case, the answer is YES, and step 5
Move to 740. In step 5740, the AEE-specific tram counter is checked to determine whether its content is greater than 28. If the value is greater than 28, the AE measurement starts (step 5742). After that, count the drum clock (
Clear +/7 (step S?44) and transfer control to status 5TS77. Status 5TS7 shown in i4 diagram (53)? Well then. Step 5748: Detect 32 tram clocks.
5750), and then the AE measurement stops. Therefore, A
During the E-measurement, the density of the front 1m of the original is averaged, and the halogen lamp lighting voltage for the next copy to be performed is determined based on this value. Then, in step 5TS754, 78 is stored in area STS and control is switched to status 5.
Move to TS78. In status 5TS78 shown in FIG. 4 (54), it is detected that the moving optical system has returned to the home position (step S?58). That is, when the AE measurement is completed and the moving optical system returns to the home position, the rAE scan flag is turned off (step 5758), and control is transferred to status 5TS80. Status 5TS8 shown in FIG. 4 (55) is a sequence program that actually performs copying. First, in step 5762, the melon of the fixing device is fixed to a predetermined II! Keep it in moderation. In step 5764, a request signal for turning on the halogen lamp is detected. Here, request No. 191 is detected to turn on the halogen lamp that was turned off while the moving optical system was moving backward. In step 3768, it is checked whether the moving optical system has reached the half position (ie, the A4 size position). When the moving optical system moves backward to the A4 size position, the Haloken lamp is turned on in step 5788. In step 5770, the previously described "halogen on" request signal is reset. After that, the process branches to detailed status processing. In the status 5TS80 shown in FIG. 4 (56), the halogen lamp is turned off in step S7?4), BCR (
Pinkham Return) Turn off the ihe-go (step 37)
76). The bin shift operation of such a sorter is Q108.
i: see FIG. 3 (1)) performs control. In step 5778, it is determined whether the "back" side copy mode should be executed. If the "back" side is not to be copied, it is determined in step 3780 whether or not the "front" side should be copied. When copying the "Fall" side, turn on the flapper 33-1 in the switch section (Figure A1 (3).
), that is, when copying the "front" side in duplex copying mode, it is necessary to introduce the transfer paper into the intermediate tray, so it is necessary to turn on the flapper 33-1 in the switchback section. be. In step 8784, the intermediate tray control plate 58 (first
Check whether the movement has been completed (see Figure (1)). This control board limits the size of the intermediate tray 59 depending on the paper size. In step 878B, the pedicle controller Q1
03 abnormality detected. In that case, serviceman call error 8B is set (step 5788). Further, in step 5780, the mode to be executed from now on is set in an internal area. Then step 57
92 and 5784 select the source of transfer paper. That is, whether to use the upper cassette or the lower cassette, or to manually feed the Ff. Make a decision on whether to supply paper. If the transfer paper is fed manually, the upper pickup solenoid is turned on (step 5798), the drum clock is cleared directly (9798), and then control is transferred to status 5TS81. If not, control is transferred to status 5TS83 (step 5794.
5800.5802). In the Steadus 5TS81 shown in FIG. 4 (57), first check the 17 drum clocks (step 58).
04.5808), turn off the power to the pickup solenoid (paper feed solenoid) (step S8+) 8)
. Then, clear the count value of the drum clock (
Stenbu 5810), status 5TS82, ll
1II-Transfer (step 5812). In the status 5TS82 shown in FIG. 4 (58), 40
step 5814°S to detect the tram clock;
131b), then control is transferred to status 5TS83 (step S818). In the status 5TS83 shown in the 41st Δ(58), first, "Check whether or not it is the back side copy mode" (
step 5820). If this is the case, then it is checked whether the "fall" side copy mode is in effect (step 5822). Furthermore, if not, check whether the sorter is enabled (step 5).
824). When in the "fall" side copy mode, this step 58
Pass 24. The reason is that there is no need to eject the paper from the main body side. After that, turn off the heat exhaust fan (step 582G),
Turn on the paper feed roller according to the upper cassette or lower cassette selected by the user (step 5828), small counter (counter for A4 size or larger) or large counter (counter for B4 or A3 size). power) is turned on (step 5830). This is useful when usage fees vary depending on paper size. Therefore, it is not relevant to normal 1-1 wood domestic use. Thereafter, the drum clock count is cleared (step 5832) and control is transferred to status 5TS84 (step 5834). In the status 5TS84 shown in FIG. 4 (60), 164 drum clocks are detected in the main steps 5836 and 8838, the developing bias DC (100 holt) is turned on in step 5840, and the
At step 42, the developing bias AC is turned on, and at step 58
At step 44, the operation of the paper feed roller is turned off, and at step 58
46, the small counter or large counter is turned off, step 8868 turns on the halogen lamp, step 5850 clears the tram clock count, and step 5852 transfers control to status 5TS 852. In the status 5TS85 shown in Figure i'54 (61),
First, step 51 to detect 100 drum clocks.
154.5858), after which the paper feed counter is incremented by +1 (step 5858). After executing steps 5860 and 5862, the optical system resist franchise is turned off. 1 Resist crunch here refers to a clutch for aligning the leading edge of the original in the optical system and the leading edge 1i1 of the ram η paper (first
(See 15 shown in Figure (1)). Step 5868 turns on the optical system forward flanch,
Step 5868 turns on the web motor. In step 5870, the final copy is 1(r
Cut it out. And the final copy is 1'1j
If the number is L, the "continuous copying flag" is turned off in step 5872, and the paper feed request 7 is sent to the BetiStal controller Q103 in step 5874.
．． l-Reset signal. - If 'I'll 1tlti' indicates that the force is being sold and copied, then in step 5876 [conversion 1θ? Turn on the copying flag J. Thereafter, control is transferred to status 5TS88 (step 5878). In the status 5TS116 shown in FIG. 4 (62), the image tip signal is detected in step 5880. Here, the image tip signal is a signal indicating the leading edge of the document. Then, after detecting the image tip signal, the energization to the solenoid for the pink amplifier of the second cassette or the lower cassette I is turned off (step 5882, 5B+14) to count 18 tigers (step 5882, 5B+14) (step 58813). Next, it is determined whether the "r back" side copy mode is set (step 3888). If so, control passes through step 5894 to status 5TS87.
Move to. If the “back” side is not to be copied, step 589
0, it is determined whether or not paper should be fed from the deck, and if '/ES, the "picture tip flag" for the petistal controller Q103 is set (step 5882
). Control is transferred to f&, status 5TS87. Next, the status 5TS8 shown in 4th t/I (133)
7 will be explained. In step 8886, if the movable optical system does not reach the predetermined position even after a predetermined period of time has elapsed, it is assumed that one of the movable optical systems has stopped, or a motor failure has occurred. Sent the man call error '82°' (step 5828). If it is not a light frame, it is determined in step 5900 whether paper should be fed from the tincture. If paper is not fed from the deck, in step S902,
Store the paper stools/chairs in the upper or lower cassette into the accumulator. If paper is to be fed from the deck, in step 5812, the paper size on the deck is stored in the storage area. If step 5802 is executed, in 5904, whether to feed the transfer paper manually or not 1f? to judge. Steps 5906 to 5810 are processing programs for checking the magnification.
[(Step 5908) WM small 1 (reduction ratio 71%) and reduction 2 (reduction ratio 82%) are tasted. Also, EI (step 5910) is expansion 1 (114%
) means. In steps 5916 to 5828, the size is checked (I4).In other words, the scanning width of the moving optical system varies depending on the copying magnification and paper size 2, so the paper size is detected in steps 5916 to 5828. Note that EII shown in step 5834 is an enlargement factor of 14
It means 2%. When the reverse position is determined (steps 5830, 5940
In step 5942, the blank exposure lamp is turned on. In other words, the scanning of the moving optical system is completed at this point. Next, in step 5944, the drum clock count (i14 is cleared. In step 5846,
RAM for mezoiscle controller Q103
Clear the area called "picture tip" inside. In step 5948, 1 is added to area STS and control is transferred to status 5TS88. If the stop key is pressed during the copy operation, it is necessary to stop the operation, so in step 5850 it is checked whether the stop key has been pressed. If the stop key is not pressed and the old and final copy operation is not in progress (step 5954), turn on the paper feed roller (step 995B), turn on the small fist counter or large counter (step 9858), and set the continuous copy flag. is turned on (step 5880). Also, if the stop key is pressed, step 5
At 952, the continuous copy flag is turned off. In status 5TS88 shown in FIG. 4 (64), after first detecting three drum clocks (step 5982
, 5984), turn off the optical system advance clutch (step 9986), and then turn off the optical system advance flag 1-
(Step 5988), 89 is stored in area STS and control is transferred to status 5TS8!3. In the status 89 shown in FIG. 4 (85), step 5
At 872, it is checked whether the reduction mode R1 or RII is selected. In the case of reduction mode, the speed of the main motor is set to low rotation speed. Ten drum clocks are checked in steps 5974 and 5976. On the other hand, if the reduced motor is not selected, the main motor is
Steps 5880 and 5982 to rotate at 1st speed
Check the 5 drum clocks. Thereafter, in step 5984, the optical system reverse flanch is turned on and control is transferred to status 5TS8A. In status 8A shown in FIG. 4 (66), step 6384.598 first detects 13 drum clocks.
6), then turn off the halogen lamp in step 99
88) Turn off the paper feed clutch in step S9!30
), the small counter or large counter is turned off (step 5992). In step 5884, a check is made to see if it is the final copy. If it is the final copy, the process branches to step 8888 and transfers control to status 8B; if it is not the final copy, a ``halogen lamp on request'' signal is sent in step 8996 (see FIG. 4).
55), step 8764, ). That is, since the Haloken lamp is turned on when the optical system moves backward during continuous copying, the flag is set here. In status 5TS8B shown in FIG. 4 (67), first, O old drum clocks are detected in step 5100O. 51002), and then it is determined whether the same size copy should be performed or not (11i) (step s+oo4). Since the determination η1 as to whether or not to perform the same size copying is a determination as to whether or not to rotate the main motor at high speed, a developing bias is set in accordance with the rotational speed (steps 51008, 51008). In step 5IOIO, the developing bias AC system is turned off. After that, control is transferred to a different status depending on whether it is the final copy or not (step 5IOI8゜s+oxj
). In other words, when copying the previous end, the status goes to 90.
If it is not the final copy, control is transferred to status 8C. In the status 5TS8G shown in FIG. 4 (68), 47
After detecting drum clocks (step 5101
7.51018), step 51020.51022), set the DC component of the developing bias to a predetermined value, respectively.
n i'l (Turn on the solenoid (Step 5102)
4). Then, 8D is stored in area STS and control is transferred to status 5TS8D. In the status 5TS8D shown in Fig. 4 (68), the village
Determine whether the work system has returned to its home position (
Step s+o28). If the moving optical system has returned to the home position, control is transferred to status 5TS85 (
Step 51o3o). In the status 5TS8F shown in FIG. 4 (70). After detecting 56 drum clocks (step 51
032,51034), control status 5TS8?・Status 5TS90 shown in FIG. 4 (72) is a processing program executed when performing the final copy (4th
(See steps 5I012 and 51014 shown in FIG. 67). In status 90, first check whether the moving optical system has returned to the home position (Step 51042), and if it has returned to the home position, raise the developing bias to DC @ 4O0 to prevent toner from getting on it (step 51042). Step 51
044). After that, clear the count value of the drum clock (step 510411), and change the control to status 5T.
The process moves to S91 (step 51048). In the status 5TSII l shown in FIG. 4 (73),
After detecting 30 tram clocks (step 51
050, 51052), turn off the transfer high pressure Step 5
1054), turn off the primary high pressure Step 5IO56)
, 1-RAM clock run l-Ai is cleared (step 51058), 82 is stored in area STS, and control is transferred to status 5TS92. In the status 5TS92 shown in FIG. 4 (74), after detecting 14 tram clocks (step 5IOB2
゜51084), turn the switching relay to the lower heat side (step, step s+o86). Then step 51068 and SlO? Ti to 0 and transfer control to status 5TS93 (step 510
71). In the status 5TS83 shown in FIG. 4 (75), 14
After detecting drum clocks (step 5I07)
2.5I074), turn off the secondary high pressure step 510
7B), counts the tram clock (clear iri, step 51078), stores 94 in area STS, and transfers control to status 5TS94. In the status 5TS94 shown in FIG. 4 (7G), it is first checked in step 5I082 whether or not only the previously described JAM m is selected. Normally, jam killing is not selected, so in step 51084 it is checked whether the switch key is pressed. In other words, the subsequent processing differs depending on when the stop key is pressed, so
Step SIO! 16 or branches to 5108B. If the stop key has been pressed (YES), it is checked in step 51088 whether or not "back" side copying is to be performed. Then, when we perform the “back” side complex 2j′, we get y+
, = advances to the next step after counting +e9xs drum clocks. If the "back" side is not copied (step S l
1186), proceed to the next step after counting 169X3 drum clocks. The reason why the i and ram clocks to be checked differ depending on whether the "back" side copy mode is set or not is because the switch puncture operation performed during front side copying requires extra time. That is, when performing lJh paper, it is necessary to reverse the transfer paper at switch bank j11. If the stop key is not pressed (step 510)
84) 2 branches to step S1096 + 2, and checks whether the number of sheets and the number of discharged sheets match. In other words, if the number of fed sheets and the number of discharged sheets do not match, 5 Since there is still some transfer paper left in the machine, the process returns to the main routine and cycles through status 5TS94.When a match is found, the program from step 81098 onwards is executed and control is transferred to status STS!15. In the status 5TS95 shown in Figure 4 (77), 13
After detecting 0 drum clocks (step 5ll
lJSll18), turn on the lower heater of the fixing unit step 51120), turn off the developing bias DC'iti and the positive part step 51122), turn off the main motor step Sll24), turn off the web motor step 5l126) , return the separation fan to low speed step 51128), turn off all blank exposure lamps step 5I130), turn off the full exposure lamp step 51132), pedicle controller Q10
Step 51138) to clear the serial data for 01 and return the flapper of the switch pack section (see Figure 1 (3)) to its original state, and to rotate the conveyance system motor.
Turn off the sorter on signal sent to 08 (step 51138), turn off the non-sort flapper on the sorter side step 51140), clear all flags used by the internal microcomputer (step 51142)
, starts a 1-minute timer for determining the number of potential control (step S++4a), stores 50 in area STS, and transfers control to status STS'50 (,
Step 51148). This completes a series of copies and returns to standby loose. (78) and (78) in FIG. 4 show the control program for serial data transmission 1 on the A side. Determine whether or not the transmission is in progress. Here, being transmitted means that the internal area flag (:A'5
The determination is made by looking at the most significant bit b7) of the send counter 5NOCT shown in FIG. 4 (78). That is, when the most significant bit b7 of 5NDCT is "1", it is determined that transmission is in progress. If transmission is not in progress, 1 is added to the contents of the send counter (ie, 5NDCD) in step 51150. Then, send counter 5NDCT hit b, or "
1”, the transmission process to the A/D converter Q104 is performed (step 51152, 5ll134°Sl
188). Also, the send counter 5NDCT is
If b4 is not formed, steps 51154-5
At 11fiO, send counter 5NOCT = 1
．． 5,9.0. Then, according to this timing, the pedicle controller Q103
Performs transmission processing to (steps 51168, 5II70
). However, when the drum is rotating (that is, when copying), it is transmitted in synchronization with the tram clock, so
No transmission is performed to the pedestal controller 0103. Also, the count 4ft of send counter 5NDC:T is 1°5! 3. In cases other than D, transmission processing to the slave Q102 is performed (step 51182). If the transmission is in progress (step 5l148), step 5
In 1172, the “transmitting flag” of ADI:CT
(The most significant bit b7 of ADCCT shown in FIG. 4 (79)
) Check. As a result, A/D converter Q
104 is being transmitted. If the A/D controller is not transmitting to Q104,
It is determined whether the Stellar 7'5l174 is currently transmitting data to the slave Q102. Then, if Q104 is being passed to the A/D controller 8, 1 is added to the ADO counter (step 51180).
, and when communicating with the slave, 1 is added to the milk V counter (step 51178). If the transmission is still in progress after a certain period of time has elapsed (step 5II82), it is assumed that an abnormality has occurred and a serviceman call error is set (step 51184). :J, Figure 5 (1) to 11) is slave QIQ2
The processing program is shown below. In FIG. 5(1), in step 51188, the RAM
Initialize the boat. In step Sl 1813, it is checked whether the 24 Holt system is turned on. When the main switch is turned on (step 51188
) YES) , STATE/B5l192 L NIOE (Initializes the display. Then, step 5llI34
Turn off the "display flag" in . This is an internal flag used by table subroutines. In step 5l186, it is checked whether the power is off (the 24-port system is turned off), and if the power is off, the process returns to step 5l188. In step 81198, it is checked whether a key has been pressed or not. If the key is not pressed, step 7" Sets the small table flag to 1 at 51200.
Then, a loop of steps 51196 to 51200 is repeated. In step 51202 shown in FIG. 5(2), the key code [KYCOD] of the pressed key is converted to the security key [KYCOD].
5KEY] area. In step 51204, "Key Refrag" is set. This "key presence flag" is an a++-like flag, and is activated in response to the depression of a key. The type of key pressed is the key code [KYC
OI]]. In steps 51206 to +230, it is determined which key has been pressed and corresponding key processing is performed. That is, when the numeric keypad (number keys) is pressed down, the numeric keypad process is performed (step 5120+(,5
1208). If the copy start key is pressed, copy start processing is performed (steps 51210 and 512).
12). In this case, the master QIOI is notified by serial communication (, ff) that the copy start key has been pressed. When the press key is pressed, the stop key is notified to the mask Q101 by serial communication. Notify that it has been pressed (step 5I214゜81216),
. If the 1111 key is pressed during copying,
The mask Q101 is notified that the person 11 key has been pressed (steps 5121B, 5422Q). When the cassette selection key (key for selecting either upper stage power cellar l-, lower stage power cellar l-, lower stage power cellar or deck) is pressed, the selection process of step 7 is performed (steps 51222 and 51).
224). If the copy magnification designation key is pressed, the magnification key process is performed (step S12: ?l (,51228). If the copy mode designation key (for example, the Ftemote designation key for double-sided copying) is pressed, the , performs the corresponding mote processing (steps 51230 and 51232).Then, the main routine on the slave side is executed.The fifth lA (3) is the timer interwoven (TiNT).
I will show you the process.Here, it uses an interval timer every 1.248 milliseconds. , (includes 1 or 11. Step 51234 performs display processing, and step 51
In step 238, key manual processing is performed, and in step 51238, timer processing is performed. In this timer processing, the designated action is performed after a set time. Next, serial-1IJ included (Si
NT) will be explained. Of the serial signals sent from mask Q101 to slave QIQ2, the upper 4 bits are set to status +h>v
, the lower 4 bits 1, 1. and 11 moves, 3; (see FIG. 7 (1) and (2)). At step 51240, load this status information and map steps 51242 to 51288 + this location according to the status of each //. At step 51270, the mask QI01
+ a little 4 and then send (send the cheek to be ri). In other words, serial communication is carried out by changing the same 11. lr ← this data person) as mentioned above, so slave Then, write the data to be sent next in advance. Thus, when 1.4 is sent from the mask QIOI, 1.4 is sent to the take's exchange at the same time. i1'; Figure 5 (5) or 7) shows the display routine.The outline of the display routine is given below.
BEL: DiSP Human power condition: 15F n with internal timer! y 11414+
)c Called output condition: [DGCNT] + 1. Processing details Displays one decint line each time it is called. Depending on the contents of DGGNT, the contents of the display area are converted to DCOA2 to 7 and set at each scan, and when the plink flag is set, it blinks every 8QQm and seC. In step 51274 shown in FIG.
DP flag of Pitsui (DPFLG shown in Figure 5 (7))
Reference). And DPFLG's hit
If "display 0f flag" is displayed on bo (step 5L278), step 51280, 5 below.
1 Performs display processing. On the other hand, if J↓・°1 is not set as the "displayable flag", the display is completely erased (step 51280). When the display town flag is on, step 512
At step 80, the descinter integer DGCNT is loaded, and steps 51292 to S12!18 are executed 11 times. In step 51300, the safe digit is lit by matching the decimal l-Gi number with the 7 segment signal. In step S, 1302, the digit I counter is incremented by 1 for the next display, and when the digit counter reaches 8, it is cleared (step 51304).
, step 2 step 51308). After that, in step 51308, the subroutine DP
CNV (see Figure 55 (e)) Execute. 511(8) and (9)? Segment LED
The output data for displaying the data and its display format have been reduced. Here, "data" refers to 16 internal data 0 to F. The display "P" is the display format when a paper jam occurs. In other words, when there are three sheets of paper left in the aircraft, "p3" is displayed. Furthermore, if a serviceman call error occurs, r
Figure 5 (10) and (11) show key manual routines. The key manual routine 41i [i is as shown below. Key human power routine LABEL: KEYiN Human power condition: DGCNT = 0 to 7 Indicates the output line, l line. KYFLG b, When ~1, Su I Tsubu and 'i! 1
Only the included key is enabled, "Press the key when it is ~1" Unable to output conditions: Key coat KYCOD KYFLG b, ← "i" set (Key J flag) Processing details, chattering for 15 to 219 milliseconds Take. If 2 or more keys are pressed, ignore them, and input the desired key once all 4eys are turned off. In step 51324 shown in FIG. 55 (11), it is determined whether bit b of the key flag is on or off. In other words, if a certain key process has not yet been completed before entering this processing program, the next key can only be set, so the message ``Pihb'' is pressed. When is on, skip and return. Also, if no key has been entered previously, step 5132
Input the key at step 8. At step 5I328, it is checked whether the key read in step 5L32G is pressed or not. If yes, bit b of the key flag is cleared (step 51330). In other words, during copying, only the stomp key and the 1 key are activated.
1< flag (KYFLG hint)
b7) Set the key presence flag only when the key is on.
·do. This is a processing program to be executed by the slave Q102. :, 'H3 Figures (1) to (11) show processing programs to be actually executed by the pedicle controller Q103. This pedicle controller Q103 (Fig. 3 (1)
) is used to control both copying and printing. At step 51338 shown in FIG. 6(1), the CPU
is initialized, and the serial data is checked in step 51338. That is, the contents of the serial communication I11 data sent from the mask QIOI are checked. Pedestal controller Q for Sten 7'51340
The input routine for the sensors that 103 has is ′, i [
Then, in step 51342, the status of deck paper feeding is set. In step 51344, the paper feeding status of the intermediate tray is set, and in step 5134[1, an oven check of the main body door is performed. In other words, the disk controller Q103 detects that the door of the main unit has been opened due to a 24V match. Step 51348 performs the home naenku of the 1st grade junior high school tray. That is, the paper size control plate 5 of the intermediate tray 58
8 (see FIG. 1 (1)) is not known where it is located when the power is turned on, so it is returned to the hole l-sensor position and then moved in accordance with the paper size. In the deck raising/lowering routine shown in step 51350, the deck rick 54L (see No. 1181<1)) is raised and lowered. In steps 51352 to 51362, the process branches to steps 51364 to 51374 depending on the status 5TSO to 5 used for sequence control. Step 513t (standby loop shown in 4) waits for the copy button to be pressed from the main body. Step 513138 performs copying processing on the "front" side in double-sided copy mode 111i. Step 81388 performs copy processing on the "front" side in double-sided copy mode 111i. At times,
Performs copy processing on the "back" side. Step 51370 performs deck paper feeding. Step 51372 selects "Front" in double-sided copy mode.
When copying, the paper is fed from the side. In step 51374, the transfer paper is reversed when it is ejected from the ejection port of the main body by performing "back" in the single-sided copying mode. )56 The EXTiNT (externally interlaced) shown in FIG. 2 issues a request when communicating with the master Q101. That request was introduced into the interwoven terminal of 0103, and this processing program
will be carried out. The pedicle controller Q103 is a mask Q l l
) Passes 1 in synchronization with the serial clock from l?
So, first of all, let's start with Step 5I376:
li:li clock mode is available. Then step 51
At 378, data sent from the pedestal controller Q103 to the master QIOI is sent. In step 5131 (0, the pedicle controller Q is opened, and in step 5I382, the pedicle controller Q is opened.
At the same time as the transmission i1i preparation of I03 is completed, the mask QIO
Send enable to +. Events shown in Figure 6 (3): 1. In the loading process, the clock of the intermediate tray 59 is incremented by the event timer l'M in the pedicle controller i-roller Q103.
:! , is applied to i child. In step 51384, the tray counter is decremented by 1 to 1+1 where the clock enters one increment. And step 51
At 38B, an event counter is set to rlJ. As a result, inclination occurs every other time and counting is started. In other words, an interrupt is generated for each pulse of the clock sent from the encoder attached to the motor shaft of the intermediate tray. In FIG. 6(4), serial data is checked. In step 51388, it is checked whether the serial communication from the master Q101 to the pedicle controller Q103 has been completed. If communication is complete, the enable to master 101 is reset in step 5I390. Master QIOI
Of the 441F communication data (see (1) in Figure 3) sent to Roller Q103 (see (1) in Figure 3),
It is determined whether or not the cheek is sent from the master QIOI. Then, each data is set according to the contents (steps 51402 to 51408, 513
98). In step 51400, the sequence timing clock is increased by l. In other words, which clock should be used to control the timing of serial + lljj by drum clock and ri's timing? Step S14'0
Callan I up at 0. FIG. 8(5) shows the deck lifting and lowering routine. In step 51408, it is determined whether the deck door is opened or closed. If the deck door is open, a deck lift up/down request is set in step 51420 to replenish transfer paper. This allows the master QIOI to be updated. I have data that I want to lower the Kirifta 54. Tenkiritta 54 responds to the signal from the master QIOI.
L is lowered (steps 51422 and 1424), and in step 51428 it is checked whether the lifter 54L has reached the maximum position. Ichiban Domate Lifter 54L
When liter 54L decreases, in step 91428
stop the motor. Further, when the deck door is closed (step 51408), a deck lift up/down request is set in step S+410. Then, when the timing is right to raise the deck, the deck is raised (steps 51412, 5141
4). In step 51416, it is checked whether the lifting of the lifter 54L has been completed. And step 51418
The rise of the liter 54L is stopped. FIG. 6(6) shows a standby loop. Here, branching to each status that should be executed after the copy start button is pressed is shown. FIG. 8 (7) shows the processing procedure when copying the "front" side in the double-sided copy mode. First, in step 51450, the control plate 58 (see FIG. 1 (1)) of the intermediate tray 58 is moved according to the paper size. In step 51452, it is checked whether the movement is completed. Once the movement is complete, step 5145
4, the intermediate tray ready signal is set. As a result, as shown in FIG. 3 (2), the pedestal controller Q103 sends 1. -Set "intermediate tray ready" No. 1, 1 of the serial data to be 1. Then, the main unit starts copying and goes to step 5.
At 145B, the completion of "front" side copying is checked. When the transfer paper is sent from the main body side to the intermediate tray 58, the control is transferred to the status 5TSO in step 51458, and the process returns to the standby loose state. FIG. 6(8) shows the processing procedure when copying the "back" side in the double-sided copying mode. Here, processing for feeding transfer paper from the intermediate tray 59 is performed. First, in step 51488, the mask QIOI waits for a "paper feed request" (see Figure 8 (1) 1! S14 [18]. When the set number of sheets have been fed (step 51470), the process returns to step 51472 (step 51472). FIG. 6 (8) shows the switchback process. The process has already been described in detail in FIG. 1 (3), so the explanation will be omitted.After the switch hack is completed, the process returns to 1]1 standby loose (step 514).
64) 6 Negative'-6 Figure (10) shows the deck paper feed loop. First, step 51474. detects that a paper feed request is issued from the master Q101. (See Figure 9 (1))
, starts the paper feeding operation (step 5I478). After that, when the set number of sheets has been fed (Stella 7'S) 4
78), +1f control is returned to standby loose (step 51480). Figure 56 (11) shows the deck 54 (see 1M (1)).
The processing procedure for carrying out kite feeding from l+, () and at the same time performing "fall" side copying in the double-sided copying mode is shown. At step 51480, the intermediate tray 58;
ly control board 56 is moved, and the completion of the movement is checked in step 51482. In step 51484, the "intermediate tray ready" message "j
(u"r 9, see Figure (2)) is sent to the mask Q101 (step 51484).Next, in response to the paper feed request from the mask QIOI, paper feeding from the deck 54 is started (step 51488). Then, when the copying of the "fall" side is completed (step 5)
1490), lJ) Transfer the control to the standby loop (step 51492). Hereinafter, the processing methods that should be used by the pedicle controller Q103 have been explained. The 712th (1) and (2) reduce the serial data sent from the mask Q101 to the crepe Q102. Here, out of 8 hyl· serial data, 1°4
16 types of communication data are sent using the focus as the status structure and the lower 4 tips as data. For example, a bin with status 0 (status 1)]・b. Ichihara on/off, Bin 1=b, Wait completed or waiting, Hint b, Master side ready or NOT ready, Bin I-b. represents the information +y indicating whether there is an abnormality on the master side or whether it is a secant condition, corresponding to each bit. Also, status 9. A, D, and E are slave QIs
Control data for the output port of 02, by locating the output port near the load. The quantity and length of 1gj service lines can be reduced. FIG. 8 shows 8-bit serial data sent from slave QI02 to master QIOI. Here, 7, the upper 3 bits are used as a status structure, and the lower 5 bits are used as data. For example, if we look at the JXi data shown at the top of the figure, bit '23 represents the status 0, and bit 'b'. and bl is the paper feed cassette, 1. is the special power supply, and bit b is the auto shutoff (that is, automatically shuts off when no operation is performed for a certain period of time).
Bin 1-b represents the pressing of the Tomp key, and Bin 1-b7+ represents the pressing of the interrupt key. The 81st Δ(1) is the serial transmission data sent from the mask QIOI to the Bedicle control D-, 7QI04, u1911Kll:2)
7) 1: Serial transmission (indicates rj data) sent from the I-ra Q104 to the mask QIOI. These serial transmission data are transmitted in synchronization with the drum clock during copying. Note that the A/D converter .104 counts pulses at this timing in the one-file, one-page copying mode or when the deck feeds paper, and performs sequence control. Fig. 10 shows a timing chart of serial transfer. Like, master QIO during copy operation
From I to pedicle controller. Serial transfer to 103M is started in synchronization with the drum clock. The three sides of this figure show the timing of the counter, internal timer, and torono clock. And when it is not copying, the inner r? In synchronization with the pulse of the B QIMA, communication is performed with the Pete 1 Starcon 10-LA QI03, and the master QIOI and slave LJI0
In between the communication with 2, the pedicle controller i/roller Q103 and the AD controller/hater QI04 are controlled. The passing interval is < , 4.99 as shown in the figure.
2 milliseconds is 111.968 seconds. During cohering, the pedicle controller Qlθ3 communicates in synchronization with the drum clock (see the bottom of the diagram)
. As already explained, FIG. 11 shows the mask Q101, the slave Q102, and the bed disk controller Q103.
゜It shows the communication line with AD converter Q104. Each of Q101 to Q104 is provided with an 8-bit shift register, and only the shift register is shown here. These shift registers operate in synchronization with the serial clock SCK from the master Q101. In addition, the data output from the SO terminal of the master QIOI is input to each Sl terminal,
At the same time, one bit of master QIO is output from each SO terminal.
It is introduced into the Sl terminal of I. In this way, data is exchanged simultaneously. f't 121 Figure shows the timing of serial input SGK, serial input Sll, and serial input Sl. Here, data is output at the rising edge of the serial ink SGK, and data is input at the falling edge of the serial ink SGK. FIGS. 13(1) to (4) show sequence control diagrams of this embodiment. FIG. 13(1) shows the control timing from when the power is turned on until the standby state is reached. That is, when the power switch is turned on and the fixing heater reaches 150° C., the main motor rotates at a low speed QT. Thereafter, when the fixing heater reaches 170° C., the main motor rotates at high speed (main motor high), and rated potential control is performed. In addition, Figure 13 (2) shows A4 size copy (1 A4 size copy, AE, within 1 minute), 13th 1 (3
) is a reduced 1-sheet copy (AE) after A4 size copying,
FIG. 13(4) shows the sequence timing when double-sided one-sheet copying (manual exposure) is performed when paper is fed from a deck. Since the control in each of these operation modes is clear from the drawings, a description thereof will be omitted. (Effects) As explained above, according to the present invention, the transfer function does not stop even when a large amount of constant dipping operation is performed.
For example, in a copying machine, there is no need to press the copy button again. As a result, the processing capacity of the entire device can be maintained almost constant.

[Brief explanation of the drawing]

Figures 1 (1) to (3) are block diagrams showing an embodiment of a double-sided copying machine to which the present invention is applied, and Figure 2 is a diagram showing the entire operating section of the double-sided copying machine in Figure 1. , Figure 3 (1) - (
3) is the control circuit diagram of the double-sided copying machine in Fig. 1, and Fig. 4 (1゛) to (78) are the master QIO diagrams shown in Fig. 3 (1).
Figure 5 (1) to (11) is a diagram showing the control procedure of I.
A diagram showing control steps 1 of the slave Q102 shown in FIG. figure,
Figures 7 (1) and (2) are diagrams showing serial communication data from master QIOI to slave Q102, and Figure 8 is a diagram showing serial communication data from slave Q102 to mask QIOI.
Figure 9 (1) is a diagram showing serial communication data from master QIOI to pedicle controller Q103, and Figure 8 (2) is a diagram showing serial communication data from pedicle controller Q103 to master Q101. stomach,:
Figure 1O is a timing chart of serial transfer, and Figure 1I is a diagram showing data, and Figure 1I is a communication control diagram performed by mask QIO1.
Figure 12 is a diagram explaining the serial clock SCK, serial out SO, and serial in S+ in Figure 11.
13 ([) to (4)] are sequence control diagrams of this embodiment. 1... Tom Hikari drum. 2...Pre-electrostatic charger, 3...Second charger, 4...2nd PX-1 upper unit, 5...Transfer charger, 6...Cleaning device, 7...Developer 8...Pre-exposure lamp. 9... Reverse exposure lamp, 11, +2... Paper feed roller, 13...'' Two-tier cassette, 14... Lower cassette, 16... 4 (Detection sensor, 17... Conveyance Held, 18... Paper detection sensor, 19-12... Solenoid, 20.21... Switch/header sensor, 33-1.
33-2...Flapper, 34...Original m-stand glass, 40...Illumination lamp, 53...Separation roller, 54...Deck, 56...Paper size control board, 57.58. ...Conveyance path, 58...Intermediate tray, 62...Non-sort bin, 66...Sort bin, 70...Copy start key, 71...Stomp key, 72...X'jl included key 73- ...One copy set key, 75...Central/Deck selection key, ? 8...Normal size copy key, 77...Enlargement copy key, 78...Reduction copy key. 79...Automatic exposure (AE) selection key, 80...Automatic duplex selection key. 82-86...Warning indicator, 87...Copy one sheet indicator, 88...Ii; II jamming indicator, 88...Waiting indicator, 90..."Front" copy Display LED, 81...
"Back" ED for displaying copy, 88... Indicator for blocking position, °]3... Indicator for indicating that there is paper in intermediate tray 58, Q101... Mask, Q102... slave. q+o3...Peticle controller, Q104.
・・A/D converter for temperature control of constant 2f' heater heat, QIl) 5~QI07...Kohyumi Yoshi I10, Q108.
QI09...Prosensor of that value. +00... Main body, 140-1... Tincture lift signal, 140-2... Inverter, +4 (1-3... Heak-on signal, 140-4... Ant gate 200... Petistal, 300. ...) 1; (Automatic document feeder (ADF), 4
00... Sorter. 800... Guinamink display section, 802... Warning lamp display +'KL 805... Potential control t'ζB, 80G... High voltage ((11 control section, 807... A E ill constant control section, 808...
Exposure wrap control>jR, 1320... Main morph control 11 yill, 82
3...Flank exposure control t'. l! . 823...Jam detection paper sensor 831...Deck, both [n1 ij no sensor, 836...
...Fuser heat, 838...Drum black/red. 850... Fixing thermistor 860... Tincture paper feed control unit, 861... Deck" 2F control unit, 862... Tincture paper size manual tζ8, 8G3...
Intermediate tray conveyance system control unit, 864... Intermediate tray paper size control unit, 865... Intermediate tray paper feed control unit, 880... Nonso River control unit, S4-5I492... Control step. Patent applicant Canon Co., Ltd. Figure 4 (2) Figure 4 (3) Figure 4 (11) (12) Figure 4 (14) (15) Figure 4 (16) (17) Figure 4 (20) Figure (21) ) Fig. 4 (28) Fig. 4 (29) Fig. 4 (37) Fig. 4 (39) (40) Fig. 4 (421 (43° (44) Fig. 4 (51) (521 Fig. 4) (53) (54) Figure 4 (57) 6) Figure 4 (Q5) (66) (67) Figure 4 (71) (72) Figure 4 (73) (74) Figure 5 (8) Fig. 5 (9) Fig. 6 Fig. 6 (4) Fig. 6 (9) (LD) 6th! Consistent t' Nihii Masaru. 2D s14θ0 1/492

Claims (1)

[Scope of Claims] An image forming apparatus 1"J characterized in that, when the temperature of the fixing device falls below a predetermined value during continuous fixing operations, the conveyance interval of the transfer paper is increased. ' a (hereinafter margin)